assertNormalizedFieldsAreCached example

    // After saving the entity the normalization should not be cached.     $this->assertFalse($cache);
    // @todo Remove line below in favor of commented line in https://www.drupal.org/project/drupal/issues/2878463.     $url = Url::fromRoute(sprintf('jsonapi.%s.individual', static::$resourceTypeName), ['entity' => $uuid]);
    // $url = $this->entity->toUrl('jsonapi');     $request_options = $this->getAuthenticationRequestOptions();
    $request_options[RequestOptions::QUERY] = ['fields' => ['node--camelids' => 'title']];
    $this->request('GET', $url, $request_options);
    // Ensure the normalization cache is being incrementally built. After     // requesting the title, only the title is in the cache.     $this->assertNormalizedFieldsAreCached(['title']);
    $request_options[RequestOptions::QUERY] = ['fields' => ['node--camelids' => 'field_rest_test']];
    $this->request('GET', $url, $request_options);
    // After requesting an additional field, then that field is in the cache and     // the old one is still there.     $this->assertNormalizedFieldsAreCached(['title', 'field_rest_test']);
  }

  /** * Checks that the provided field names are the only fields in the cache. * * The normalization cache should only have these fields, which build up * across responses. * * @param string[] $field_names * The field names. * * @internal */